chandler



C. B. CHANDLER.

MACHINE FOR FORMING WHEEL Huss.

APPUCUON FILED MAH. 5| 19,5- 1,193,664. Patented Aug. 8, 1916.

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MACHINE FOR FORMING WHEEL HUBS.

APPLlcArloN min MAR.15.1915.

1 ,1 93,664. Patented Aug. 8, 191.6.

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f7# z/M @We U5. @AMM/w C. B. CHANDLER. MACHINE FOR FORMING WHEEL Huss. APPLICATION FILED MAR. I5. |915.

Patented Aug. 8, 1916.

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CARL B. CHANDLER, OF HAVANA, ILLINOIS, ASSIGNOR TO HAVANA METAL WHEEL CO., 0F HAVANA, ILLINOIS, A CORPORATION OF ILLINOIS.

MACHINE FOR FORMING WHEEL-HUBS.

Specication of Letters Patent.

Patented Aug. 8, 1916.

To all whom it may concern:

Be it known that I, CARL B. CHANDLER, a citizen of the United States, a resident of Havana, in the county of Mason and State of Illinois, have invented new and useful Improvements in Machines for Forming Wheel-Hubs, of which the following is a specification.

My invention relates to improvements in machines for forming Wheel hubs, and the principal object is the provision of a mechanism for forming metal Wheel hubs from tubular blanks.

Another objec-t is the provision of such a mechanism which operates eiciently to produce the desired article,r and the operation of which may be controlled with facility.

Further objects include the improvement in details of construction and arrangement.

To the accomplishment of the foregoing and such other objects as may hereinafter appear, my invention consists in 'the combination, construction and arrangement of parts hereinafter described, and then sought to be defined in the appended claims, reference being had to the accompanying drawings which show merely for the purpose of illustrative disclosure, a preferred embodiment of my invention, it being understood that various changesv may be madev in practice within the scope of the claims, Without digressing from my inventive idea.

In the drawings: Figure 1 represents a side elevation of a machine constructed according to my invention, the parts being shown in the position assumed when the operation of forming a wheel hub is practically completed; Fig. 2 is a similar view of the other side of the machine, the parts, however, being shown in their positions after the insertion of a blank, but previous to the presentation of the blank to the dies; Fig. 3 is a vertical section taken substantially on line 3 3 of Fig. 1; Fig. 4 is a vertical section on an enlarged scale on line 4 4 of Fig. 2 through the rotary dies, showing the mandrel and its supporting mechanism, a blank being shown in position, the parts being illustrated in the position assumed previous to the presentation to the action of the dies; Fig. 5 is a detailed view of part of the automatic stop mechanism, and Fig. 6 is a detail of one of the side plates for the dies.

In the drawings, the numeral 1 designates the bed or support for the machine on which the various operating parts are mounted. Suitable spaced members 2 are mounted on the upper part of this bed 1 to provide supporting means for the rotary die and the operating parts therefor. Journaled in the arm 3 and in the bearings 4 provided in said members 2, is the main driving shaft 5 driven by means of pulley 6 from any suitable source of power. Secured to this shaft 5 intermediate its ends and between the spaced members 2, is the gear or pinion 7, which drives the rotary die operating gear 8, the latter being in the form of a ring secured to the cylindrical 0r annular plate 9, within which is positioned the cylindrical die member 10, shown as provided with suitable grooves 11 with which the mandrel coperates, as will be described. This die member 10 is secured to the cylindrical or annular member 9 so as to rotate therewith by means of the annular side plates 12, having the key portions 13 fitting in corresponding grooves in the cylindrical or annular member 9 and held in position by means of the counter-sunk cap screws 14. As stated hereinbefore, these parts rotate between the upper spaced members 2, being held in position by and journaled in the cap members 15, which are bolted, as at 16, to the spaced plates 2. By this construction, the rotatable die 10 is driven from the driving shaft 5 through gears 7 and 8 so that the proper internal grooves and external swells are formed in the blank by means of the coperation of the mandrel with the grooves 11 in the die. This mandrel is designated by the numeral 17, having the body portion 18 and the extensions 19 and 20, the latter being the longer. The body portion of the mandrel is provided with suitable flanges or annular projections 21. The tubular blank 22 is adapted to be placed over this mandrel and the latter is moved so as to press the blank against the inner surface of the rotary die, the annular projections 21 corresponding to the grooves 11 in the die. so that as the die rotates and increased pressure is applied to the mandrel, the necessary swells will be formed in the blank. This mandrel is normally supported a-t its longer extension 20 by means of suitable connections With bar 23, this bar being pivotally journaled on the short shaft 24. To the end of this bar is provided the adjusting and holding plate 25, which is provided with the journal 26 to receive the extension 2O of the mandrel and which also has the adjusting bar 27, having a horizontal portion 28 and the downwardly extending portion 29. The journal or aperture 26 is greater in diameter than the diameter of extension 20 of the mandrel so that the latter fits loosely therein. Set screws 30 and 3l are provided in said portions 28 and 29, whereby the mandrel is suitably adjusted in said holding and supporting device. This adjustment is such that when in operative position, the mandrel will clear the centering device 32. This centering device is in the form of a V-shaped trough member', supported in suitable side plates 33 and extending through the hollow rotary die, as shown particularly in Figs. 2, 3 and 4. It is on this centering device 32, that the blank 22 is adapted to rest, and in connection therewith I provide the end gage 34, which is adjustable by means of the set screw 35 so that the position of the end of the blank may be xed, as desired. These parts coperate to properly position the blank in the machine, so that when the mandrel is raised, the blank ,will be presented properly to the action of the die.

The purpose in making the extension 2O of less diameter than the aperture or journal 26 in member 25, is so that when the mandrel is in working position under pressure, it runs free in the opening or journal 26, but when down or not Working, it rests against the side of said opening or journal and sags to some extent. This sag is regulated by the set screw 30 which assists in supporting the mandrel above the centering device 32 so that the blank may be readily applied thereon without the necessity of moving any of the parts. The set screw 31 serves as a stop for that end of the mandrel, whereby after the mandrel has been once adjusted in position, it may be removed and replaced without disturbing theadjustment. The centering device 32 serves to place the blank to be rolled into proper position relative to the die, as the blank must be parallel to the axis of the die or will run toward one end when rolled and be oval instead of round and therefore be defective. If the tube is presented to the die squarely, it will run through and be perfect. The gage 34 serves to govern the longitudinal position of the blank relative to the `mandrel so that it is properly formed.

The means for raising the mandrel so as to present the blank to the die includes the pressure blocks or members 36, which are secured on the ends 37 of the forked lever 38, the latter being pivotally mounted on the shaft 24 and adapted to be oscillated thereon, so as to move the pressure blocks up and down in a vertical direction. These pressure blocks are provided with the open bearings 39, which are adapted to receive the extensions of the mandrel as shown particularly in F ig. 3, so that when the pressure blocks are moved upwardly, the mandrel will be lifted, carrying with it the blank which will be presented to the die. In this connection, I also provide means for automatically lifting the adjusting bar 23. This is done by means of the lug or dog 40 which is detachably mounted on the adjusting bar 23 in the path of movement of one of the forks of the lever 38, the parts being arranged in proper relation so that when the mandrel is properly centered in a horizontal direction, the forked arm of the lever 38 will engage the dog and carry the adjusting bar upwardly, so as not to disturb the adjustment of the mandrel. This adjusting bar 23 is provided with a` suitable counterweight 41 and also a suitable holding chain 42, the latter being provided with adjusting means in the form of a turn-buckle 43, so as to vary its length. This chain is for the purpose of limiting the downward movement of the adjusting means on the end of the bar 23, so that the mandrel is held above the guide 32 and the blank can be readily placed thereon or the finished product readily removed.

The pressure block carrying lever 38 has the suitable ladjustable connecting rod 44 to the crank arm 45 on shaft 46 journaled in the base or support and which shaft has the pulley 47 and the worm wheel 48 mounted thereon. The pulley 47 is connected by means of belt 49 with the loose pulley 50 mounted on the end of the shaft 5 opposite to the driving end and adjacent the driving member 5l, which is Xed to the shaft and has a frictional face 52, the loose pulley 49 having a corresponding frictional face 53 and being adapted to be moved by means of the lever 54 pivoted at 55. The manipulation of the lever forces the loose pulley against the frictional driving member 51, so that the pulley 47 will be driven and 'the lever or arm 38 operated through the rod connection 44. This part of the operation occurs after the insertion of the blank in position on the mandrel, when it is desired to move the mandrel upwardly in the short space of time, so as to quickly present the blank to the die. When it has reached this position, the operator permits the frictional parts to be disengaged and drives the worm wheel 48 by the following positive connections.

Journaled in the lower' part of the base i's the shaft 56 driven by means of belt 57 from the main driving shaft 5, and having on the end thereof, bevel gear 58, which meshes with bevel gear 59 on shaft 60, having the worm 61 thereon, this Worm being in engagement with the worm Wheel 48. These parts are mounted on a suitable support 62 which is loosely secured by means of the bolt and slot connection 63 to the base or support of the machine. Connected to this support 62 is the link 64 connected to the rod 65 leading to the foot pedal 66, which is pivotally mounted as at 67. The tripping lever 68 is pivotally mounted on the base at 69 and is also pivotally secured to the link 64 and rod 65 as at 70, whereby as shown in Fig. 5, a toggle joint or lever is provided. This tripping member has the engaging end 71, which coperates with the stop or projection 7 2 of the worm wheel 48. Now then, after the upward movement of the pressure blocks, due to the downward movement of the outer end of lever 38, the operator, by pressing the foot pedal 66, moves the parts shown in Fig. 5 from their inoperative position, as there indicated, to the position shown in Fig. 1, so that the shaft 46 is driven by means of worm Wheel 48, worm 61 and bevel gears 59 and 58. This is during the pressure applying stages of the operation, when the movement of the pressure blocks upwardly should be slower than the previous movement. The stop 72 is so arranged that when the pressure blocks reach the limit of their upward movement, it will engage and actuate the tripping lever 68, disengaging the worm from the worm wheel causing the parts to assume the position shown in Fig. 5. The operator may then operate the hand lever 54 to cause the frictional driving connection to be made so as to bring the pressure blocks to their lower position quickly, though these parts normally return to their lower position by gravity.

It is to be understood that I preferably use a heated blank in this machine. The blank is applied on the mandrel and properly positioned by means of a centering device and gage, the parts being in the position shown in Fig. 4. In this position the mandrel is supported at its left hand end by means of the holding and adjusting devices, the other end being slightly below the end which is supported. In view of this construction, the blank may be quickly applied as the gage 34 limits the longitudinal movement thereof and the centering device 32 positions the same so that when the mandrel is raised, the blank will be presented into proper position to the action of the die, so that the swells are made at the proper place therein and in the proper manner. If it were not for the centering device and gage, as well as the adjustment for the mandrel, it is possible that the blank might be presented at an angle to the die or in some other improper manner so that the hub would not be formed properly and would have to be rejected as being defective.

The hand lever 54 is operated to engage the frictional driving faces which operatively connect the shaft 46 with the driving means so that the lever 38 is oscillated to move the pressure blocks 36 upwardly. These blocks engage the extensions 19 and 20 of the mandrel and move the same with the blank thereon quickly upwardly. In this position, the mandrel is centered in the journal or arbor Q6 in the bar Q3. Vhen the blank is presented to the die, less pressure is applied to lever 54 so that the operative connection is broken. The pedal 66 is then operated, throwing the worm into engagement with the worm wheel, so that the oscillation of the lever 38 is continued, but at a slower rate, this being during the pressure applying or operating stages of the formation of the hub. This movement may be discontinued by the operation of the foot lever throwing the worm out of engagement with the worm wheel or by the automatic actuation of the tripping lever 68 by means of the stud or projection 79. engaging the same and tripping it. This occurs when the parts are in the position shown in Fig. 1, so that by the actuation of the lever 54, the rotation of the shaft 46 is continued and the lever 38 oscillated quickly to drop the pressure blocks 36 and the mandrel 17 to the position shown in Figs. 2 and 4, so that the completed article may be readily removed from the mandrel.

By using a hollow cylindrical die and presenting the blank to the inside surface thereof, a more perfect article is formed. This also results in the scale dropping away and not being pressed into the metal. While I have described this mechanism as being directed particularly to the formation of wheel hubs, it is obvious that it is readily adaptable to other purposes and that while the operating lever is moved in a certain direction, this may be changed so as to present the blank in different directions to the die.

It is therefore seen that I have provided a mechanism which is simple in construction and efficient in operation. The operation may be controlled with facility.

What I claim is:

1.. A mechanism of the character dcscribed, including in combination, a rotatable die, means for rotating said die, a mandrel adapted to support a blank and present the same to the die, and means for moving the mandrel so as to present the blank to the die, said means including a lever, pressure blocks secured to said lever and engaging said mandrel, and means for reciprocating said lever.

2. A mechanism of the character described, including in combination, a rotatable die, means for rotating said die, a mandrel adapted to support a blank and present the same to the die, and means for moving the mandrel so as to present the blank to the die, said means including a lever having forked portions, pressure blocks secured to said forked portions and adapted to engage the end portions of said mandrel, and means for reciprocating said lever.

3. A mechanism of the character described, including' in combination, a rotatable die, means for rotating said die, a mandrel adapted to support a blank and present the same to the die, means for moving the mandrel so as to present the blank to the die, and a centering device adapted to receive the blank and position it so that the mandrel presents it properly to said die.

l. A mechanism of the character described, including` in combination, a rotatable die, means for rotating said die, a mandrel adapted to support a blank and present the same to the die, and means for moving the mandrel so as to present the blank to the die, a centering device adapted to receive the blank and position it so that the mandrel presents it properly to said die, and a gage for determining the proper position of the blank tranversely of the machine.

5. A mechanism of the character described, including in combination, a rotatable die, means for rotating said die, a mandrel adapted to support a blank and present the same to the die, means for moving the mandrel so as to present the blank to the die, and means for holding and adjusting said mandrel, so as to permit the application of the blank thereon.

G. A mechanism of the character described, including in combination, a rotatable die, means for rotating said die, a mandrel adapted to support a blank and present the same to the die, means for moving the mandrel so as to present the blank to the die, means for holding and adjusting said mandrel, so as to permit the application of the blank thereon, said means including a bar or arm having a journal therein through which said mandrel extends, and means for adjustably engaging the end of the mandrel and the side of the mandrel.

7. In a mechanism of the character described, including in combination, a rotatable die, means to rotate the die, a mandrel positioned within said die and adapted to receive a tubular blank, means for moving the mandrel so as to present the blank to the die for forming, said moving means being normally out of engagement with said mandrel, and means for normally holding the mandrel in spaced position relative to the die so as to permit the application of the blank thereon.

8. In a mechanism of the character described, including in combination a rotatable die, means to rotate said die, a mandrel positioned Within said die and adapted to receive a tubular blank, means for supporting the mandrel out of engagement with the die so as to permit the application of the blank thereon, means for moving the mandrel so as to present the blank to the die for forming, said moving means being normally out of engagclnent with said mandrel.

9. In a mechanism of the character described, including in combination, a rotatable die, means to rotate the die, a mandrel positioned within the die and adapted to receive a tubular blank, means at one end of the mandrel for .supporting the same out of engagement with the die leaving one end free so that the blank may be applied thereto without the removal or adjustment of any parts, means for moving the mandrel so as to present the blank to the die, said moving means being normally out of engagement with said mandrel.

10. In a mechanism of the character described, including in combination, a rotatable die, means to rotate the die, a mandrel positioned within said die and adapted to receive a tubular blank, means for moving the mandrel so as to present the blank to the die, means for normally holding the mandrel spaced relative to the die so as to permit the application of the blank thereon, and means for centering the blank relative to the mandrel and die.

11. In a mechanism of the character described, including in combination, a rotatable die, means to rotate the die, a mandrel positioned within said die and adapted to receive a tubular blank, means for movin the mandrel so as to present the blank to the die, mans for normally holding the mandrel spaced relative to the die so as to permit the application of the blank thereon, means for centering the blank relative to the mandrel and die, and a gage for determining the position of the blank transversely of the machine and longitudinally of itself.

l2. In a mechanism of the character described, including in combination, a rotatable die, means to rotate the die, a mandrel positioned within said die and adapted to receive a tubular blank, means for moving the mandrel so as to present the blank to the die, means for normally holding the mandrel so as to permit the application of the blank thereon, said moving` means including a lever having a forked portion and pressure blocks secured to said forked portions and having open bearings to receiv'e said mandrel and means for reciprocating said lever.

13. A mechanism of the character described, including in combination, a driving means, a rotatable die, connections between said driving means and said die to rotate the same, a mandrel positioned Within said die and adapted to be moved to present a blank to said die to be operated upon,

means for moving said mandrel, said means being operated from said driving means and including a frictional connection so that the mandrel may be moved quickly and a posi*- tive connection so that the mandrel may be moved slowly.

14. A mechanism of the character described, including in combination, a driving means, a rotatable die, connections between said driving means and said die to rotate the same, a mandrel positioned within said die and adapted to be moved to present a blank to said die to be operated upon, means for moving said mandrel, said means being operated from said driving means and including a frictional connection so that the mandrel may be moved quickly and a positive connection so that the mandrel may be moved slowly, and automatic means for throwing said last mentioned connection out of operative relation.

15. A mechanism of the character described, including in combination, a driving means, a rotatable die, connections with said driving means for rotating the die, a mandrel adapted to be positioned within said die and having end extensions, said mandrel being adapted to receive a tubular blank, and to be moved to present the blank to the die, means for adjustably supporting the mandrel so as to permit the application of the blank thereon, means for moving the mandrel including pressure blocks having bearings adapted to receive the extensions thereof, said moving means being adapted to engage said adjustable supporting means so as not to disturb the adjustment of said mandrel.

16. A mechanism of the character described, including in combination, a driving means, a rotatable die, connections with said driving means for rotating the die, a mandrel adapted to be positioned within said die and having end extensions, said mandrel being adapted to receive a tubular blank, and to be moved to present the blank to the die, means for adjustably supporting the mandrel so as to permit the application of the blank thereon, including a pivotally mounted bar or arm having adjustable means on the end thereof engaging one of the end extensions of said mandrel, and means for moving said mandrel.

17. A mechanism of the character described, including in combination, a driving means, a rotatable die, connections with said driving means for rotating the die, a mandrel adapted to be positioned within said die and having end extensions, said mandrel being adapted to receive a tubular blank, and to be moved to present the blank to the die, means for adjustably supporting the mandrel so as to permit the application of the blank thereon, including a pivotally mounted bar or arm having adjustable means on the end thereof engaging one of the end extensions of said mandrel, means for moving said mandrel, said moving means adapted to engage said bar or arm so as to move the bar or arm with the mandrel without disturbing the adjusted position of the mandrel.

18. A mechanism of the character described, including in combination, a driving means, a rotatable die, connections with said driving means for rotating the die, a mandrel adapted to be positioned within said die and having end extensions, said mandrel being adapted to receive a tubular blank, and to be moved to present the blank to the die, means for adjustably supporting the mandrel so as to permit the application of the blank thereon, means for moving the mandrel including an operating lever having a forked portion, pressure blocks secured to said forked portion and having bearings adapted to receive the end extensions of said mandrel, and means for reciprocating said lever.

19. A mechanism of the character described, including a base or support, a pair of spaced members mounted thereon, driving means journaled on said base or support, an annular die member rotatably mounted between said spaced members, cap members being provided so as to complete the journal for said rotatable die, said die including an annular gear portion, a cylindrical supporting portion and a cylindrical annular die proper, having grooves provided on its inner surface and side plates having key portions adapted to engage said die proper and said cylindrical supporting portion, a gear or pinion on said driving means adapted to engage said annular gear, a mandrel adapted to be positioned within said die and to receive a blank and means for moving the mandrel to present the blank to the die.

20. A mechanism of the character described, including a base or support, a pair of spaced members mounted thereon, driving means ournaled on said base or support, an annular die member rotatably mounted between said spaced members, cap members being provided so as to complete the journal for said rotatable die, said die including an annular gear portion, a cylindrical supporting portion and a cylindrical annular die proper, having grooves provided on its inner surface and side plates having key portions adapted to engage said die proper and said cylindrical supporting portion, a gear or pinion on said driving means adapted to engage said annular gear, a mandrel adapted to be positioned within said die and to receive a blank, means for moving the mandrel to present the blank to the die, and gieans for adjustably supporting the manrel.

21. A mechanism of the character described, including in combination, a base 0r support, a. hollow cylindrical die rotatably mounted thereon, means for rotating said die, a mandrel positioned within said die and adapted to support a tubular blank thereon, and means for moving the said mandrel to present the blank to the die said moving means being normally out of engagement with said mandrel.

22. A mechanism of the character described, including in combination, a base or support, a hollow cylindrical die rotatably mounted thereon, means for rotating said die, a mandrel positioned within said die and adapted to support a tubular blank thereon, and means for moving the said mandrel to present the blank to the die, said means including a lever having pressure blocks on each side of said die, said pressure blocks being normally out of engagement with said mandrel, and means for oscillating said lever to cause said pressure blocks to engage said mandrel.

23. A mechanism of the character described including in combination, a base or support, a hollow cylindrical die rotatably mounted thereon, means for rotating said die, a mandrel positioned within said die and adapted to support a tubular blank thereon, means for moving said mandrel to present the blank to the die, said means including a lever having open bearings, said bearings being normally out of engagement with said mandrel and means for oscillating said lever to cause said mandrel to rest in said bearings, whereby the blank is presented to the die.

24. A mechanism of the character described including in combination, a base or support, a hollow cylindrical die rotatably mounted thereon, means for rotating said die, a mandrel positioned within said die and adapted to support a tubular blank thereon, means for moving said mandrel to present the blank to the die, said means including a forked lever providing arms on each side of said machine, each arm having an open bearing, said bearings being normally out of engagement with said mandrel and means for oscillating said lever to cause said mandrel to rest in said bearings, whereby the blank is presented to the die.

25. A mechanism of the character described including in combination, a driving means, a rotatable die, connections between said driving means and said die to rotate the same, a mandrel positioned within the die and adapted to be moved to present a blank to said die to be operated upon, means for moving said mandrel, said means including one connection whereby the mandrel may be moved comparatively quickly and another connection whereby the mandrel may be moved comparatively slowly.

26. A mechanism of the character described including in combination, a driving means, a rotatable die, connections between said driving means and said die to rotate the same, a mandrel positioned within the die and adapted to be moved to present a blank to said die to be operated upon, means for moving said mandrel, said means including one connection whereby the mandrel may be moved comparatively quickly and another connection whereby the mandrel may be moved comparatively slowly, said connections being separate, and an automatic means for throwing said last mentioned connection out of operative relation.

27. A mechanism of the character described, including in combination, a driving means, a rotatable die, connections with said driving means for rotating the die, a mandrel adapted to be positioned within said die and adapted to receive a tubular blank and to be moved to present the blank to the die, means for supporting the mandrel so as to permit the application of the blank thereon, said supporting means being movable, means for engaging and moving the mandrel so as to present the blank to the die, and means for correspondingly moving said mandrel supporting means.

28. A mechanism of the character described, including in combination, a driving means, a rotatable die, connections with said driving means for rotating the die, a mandrel adapted to be positioned within said die and adapted to receive a tubular blank and to be moved to present the blank to the die, means for supporting the mandrel so as to permit the application of the blank thereon, said supporting means being movable, means for engaging and moving the mandrel so as to present the blank to the die, and connections between said mandrel moviing means and said mandrel supporting means so that when the moving means is actuated to present the blank to the die, said supporting means will be correspondingly moved.

29. A mechanism of the character described, including in combination, a driving means, a rotatable die, connections with said driving means for rotating the die, a mandrel adapted to be positioned within said die and adapted to receive a tubular blank and to be moved to present the blank to the die, means for supporting the mandrel so as to permit the application of the blank thereon, means for engaging and moving the mandrel to present the blank to the die, said moving means being normally out of engagement with said mandrel, and connections between said `moving means and said mandrel supporting means whereby when the moving means is actuated, said supporting means will also be moved.

30. A mechanism of the character described, including in combination, a driving means, a rotatable die, connections with said driving means for rotating the die, a mandrel adapted to be positioned within said die and adapted to receive a tubular blank and to be moved to present the blank to the die, means for supporting the mandrel so as to permit the application ot the blank thereon, said supporting means including a pivotally mounted bar adapted to normally support the mandrel in its lower position, means for moving the mandrel to present the blank to the die, said means being normally out of engagement with the mandrel and connections between said moving means and said mandrel supporting means whereby when the moving means is actuated, the supporting means will be moved.

31. A mechanism of the character described, including in combination, a driving means, a rotatable die, connections with said driving means for rotating the die, a mandrel adapted to be positioned within said die and adapted to receive a tubular blank and to be moved to present the blank to the die, means for supporting the mandrel so as to permit the application of the blank thereon, said supporting means including a pivotally mounted bar adapted to normally support the mandrel in its lower position, means for moving the mandrel to present the blank to the die, said means being nor mally out of engagement with the mandrel and connections between said moving means and said mandrel supporting means where'- by when the moving means is actuated, the supporting means will be moved, said supporting means having means for limiting its return movement whereby the mandrel will be held in its proper adjusted position after actuation of the moving means.

Copies of this patent may be obtained for five cents each, by addressing the 32. A mechanism of the character described, including in combination, a driving means, a rotatable die, connections with said driving means for rotating the die, a mandrel adapted to be positioned within said die and adapted to receive a tubular blank and to be moved to present the blank to the die, means for supporting the mandrel so as to permit the application ot the blank thereon, a centering means for positioning the blank properly, said supporting means normally holding the mandrel spaced from the centering means, and means for moving the mandrel to present the blank to the die and for moving said supporting means.

33. A mechanism of the character described, including in combination, a driving means, a rotatable die, connections with said driving means for rotating the die, a mandrel adapted to be positioned within said die and adapted to receive a tubular blank and to be moved to present the blank to the die, means for supporting the mandrel so as to permit the application of the blank thereon, including a pivotally mounted bar having adjustable means for engaging one of the ends of said mandrel, said supporting means being normally adapted to hold the mandrel in its lower position and being adapted to return the mandrel to its lower position when released, means for limiting the return movement of said pivotally mounted bar, means for moving said mandrel, said moving means adapted to engage said bar so as to move the bar with the mandrel without disturbing the adjusted position of the mandrel.

CARL B. CHANDLER.

WVitnesses:

C. O. CLEER, L. H. BoRGEL'r.

Commissioner of Patents,

Washington, D. C. 

